Low-temperature desulfuration and denitration system

Abstract

The invention discloses a low-temperature desulfuration and denitration system which comprises a rotational flow tower and a first waste gas outlet formed in the top of the rotational flow tower, the first waste gas outlet is connected with an orifice plate corrugated packing absorption tower, the bottom of the rotational flow tower is provided with a water tank, the water tank is provided with a first waste liquid outlet, the first waste liquid is connected with a hot water pond, the hot water pond is connected with a cooling water tower, the bottom of the cooling water tower is provided with a cooling water pond, the orifice plate corrugated packing absorption tower is connected with an alkali liquor pond, the alkali liquor pond is connected with an alkali liquor circulating pump and the hot water pond simultaneously, the alkali liquor circulating pump is connected with the orifice plate corrugated packing absorption tower, exhaust afterheat is fully utilized to process a used strong solution, the problem of absorption solution processing is solved, emission of a plenty of afterheat to the atmosphere is avoided, energy is saved, and the environment is protected; nitric oxides and sulfide are jointly processed, system equipment is reduced, and investment cost is lowered greatly; sulfite formed after the sulfide is absorbed is fully utilized for reducing the nitric oxides, consumption of absorbent is reduced, and cost is saved.

Description

technical field [0001] The invention relates to the technical field of environmental protection equipment, in particular to a low-temperature desulfurization and denitrification system for dust treatment and organic waste gas treatment. Background technique [0002] In recent years, the problem of air pollution has become more and more serious. As a large developing country, my country will still face the serious situation of increasing air pollution for a long time to come. Many industries in industrial production require high-temperature heating treatment. During the heating process, a large amount of exhaust gas is emitted. These exhaust gases are mixed with harmful impurities; dust generated by grinding of industrial products, raw material crushing / grinding, etc. Not only does it cause great harm to the human body, but it also pollutes the atmospheric environment. It has not reached the national emission standards. If organic waste gas and dust are allowed to be discharg...

AI Technical Summary

Problems solved by technology

Not only does it cause great harm to the human body, but it also pollutes the atmospheric environment. It does not meet the national emission standards. If organic waste gas and dust are allowed to be discharged into the atmosphere, it will cause serious pollution to the surrounding environment of the project. Therefore, it is necessary to clean up the production The organic waste gas and dust generated in the process are effectively treated so that they can meet the appropriate emission requirements before being discharged into the atmosphere

[0003] At present, the conventional combustion system of the boiler is composed of air-fuel. 21% of the oxygen in the air participates in combustion, and 78% of the nitrogen does not participate in the combustion. Heat loss, at the same time, nitrogen reacts with oxygen at high temperature to form NOX gas, which can easily form acid rain when discharged into the atmosphere, endangering the normal survival and life of surface animals and plants, and causing environmental pollution; at the same time, the boiler will also produce a large amount of sulfur during the combustion process The traditional desulfurization and denitrification methods generally divide desulfurization and denitrification into two steps, that is, two sets of equipment are required, which makes the investment cost too high, and a large amount of waste heat and nitrite will be generated during the treatment process. , cannot be reused, and the processing cost is high

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